Question

twelve large bottles of water cost 9 dollars jaw many for 3$ what's the cost per bottle how much would 7 bottles of water cost

Answer 1

12 large bottles = $9

`a.\text{ number of bottles one can buy for \$3 = }(12*3)/(9)=(36)/(9)=4\text{ bottles}`
`\begin{gathered} b\text{. 4 bottles = \$3} \\ 1\text{ bottle =?} \\ \text{cost per bottle = \$}(3)/(4)=0.75\text{ dollars} \end{gathered}`
`\begin{gathered} c\text{. 12 bottles = \$9} \\ 7\text{ bottles = ?} \\ \text{cost of 7 bottles = }(9*7)/(12)=(63)/(12)=5.25\text{ dollars} \end{gathered}`